docs: def has_kerning_info(ttFont):
    """A font has kerning info if it has a GPOS table containing at least one
    Pair Adjustment lookup (eigther directly or through an extension
    subtable)."""
    if "GPOS" not in ttFont:
      return False
  
    if not ttFont["GPOS"].table.LookupList:
      return False
  
    for lookup in ttFont["GPOS"].table.LookupList.Lookup:
      if lookup.LookupType == 2:  # type 2 = Pair Adjustment
        return True
      elif lookup.LookupType == 9:  # type 9 = Extension subtable
        for ext in lookup.SubTable:
          if ext.ExtensionLookupType == 2:  # type 2 = Pair Adjustment
            return True